Struct lending_iterator::lending_iterator::adapters::Filter

pub struct Filter<I, F>where
    I: LendingIterator,
    F: FnMut(&Item<'_, I>) -> bool,{ /* private fields */ }

The impl LendingIterator returned by .filter().

Trait Implementations

impl<'next, I, F> LendingIteratorඞItem<'next, &'next Filter<I, F>> for Filter<I, F>where I: LendingIterator, F: FnMut(&Item<'_, I>) -> bool,

type T = <I as LendingIteratorඞItem<'next, &'next I>>::T

The “output” of this whole hand-rolled GAT: think of LendingIteratorඞItem<'lt>::T as of LendingIterator::Item<'lt>.

impl<I, F> LendingIterator for Filter<I, F>where I: LendingIterator, F: FnMut(&Item<'_, I>) -> bool,

fn next(self: &mut Filter<I, F>) -> Option<Item<'_, I>>

Query the next() Item of this Self iterator.

fn filter<F>(self, should_yield: F) -> Filter<Self, F> where Self: Sized, F: FnMut(&Item<'_, Self>) -> bool,

LendingIterator counterpart of Iterator::filter().

fn for_each(self, f: impl FnMut(Item<'_, Self>))where Self: Sized,

LendingIterator counterpart of Iterator::for_each().

fn fold<Acc>(self, acc: Acc, f: impl FnMut(Acc, Item<'_, Self>) -> Acc) -> Accwhere Self: Sized,

LendingIterator counterpart of Iterator::fold().

fn try_for_each<Err>( &mut self, f: impl FnMut(Item<'_, Self>) -> Result<(), Err> ) -> Result<(), Err>

LendingIterator counterpart of Iterator::try_for_each().

fn try_fold<Acc, Err>( &mut self, acc: Acc, f: impl FnMut(Acc, Item<'_, Self>) -> Result<Acc, Err> ) -> Result<Acc, Err>

LendingIterator counterpart of Iterator::try_fold().

fn all(&mut self, predicate: impl FnMut(Item<'_, Self>) -> bool) -> boolwhere Self: Sized,

LendingIterator counterpart of Iterator::all().

fn any(&mut self, predicate: impl FnMut(Item<'_, Self>) -> bool) -> boolwhere Self: Sized,

LendingIterator counterpart of Iterator::any().

fn by_ref(&mut self) -> &mut Self where Self: Sized,

LendingIterator counterpart of Iterator::by_ref().

fn count(self) -> usizewhere Self: Sized,

LendingIterator counterpart of Iterator::count().

fn find<'find>( &'find mut self, predicate: impl 'find + FnMut(&Item<'_, Self>) -> bool ) -> Option<Item<'find, Self>>where Self: Sized,

LendingIterator counterpart of Iterator::find().

fn fuse(self) -> Fuse<Self> where Self: Sized,

LendingIterator counterpart of Iterator::fuse().

fn nth(&mut self, n: usize) -> Option<Item<'_, Self>>

LendingIterator counterpart of Iterator::nth().

fn position<F>( &mut self, predicate: impl FnMut(Item<'_, Self>) -> bool ) -> Option<usize>where Self: Sized,

LendingIterator counterpart of Iterator::position().

fn skip(self, count: usize) -> Skip<Self> where Self: Sized,

LendingIterator counterpart of Iterator::skip().

fn take(self, count: usize) -> Take<Self> where Self: Sized,

LendingIterator counterpart of Iterator::take().

fn map<NewItemType: HKT, F>(self, f: F) -> Map<Self, F, NewItemType> where for<'next> F: FnMut([&'next Self; 0], Item<'next, Self>) -> Feed<'next, NewItemType>, Self: Sized,

LendingIterator counterpart of Iterator::map().

fn map_to_ref<R: ?Sized, F>(self, f: F) -> Map<Self, F, HKTRef<R>> where for<'any> F: FnMut([&'any Self; 0], Item<'any, Self>) -> &'any R, Self: Sized,

Convenience method: same as .map(), but for hard-coding the HKT parameter to HKTRef<R> = HKT!(&R).

fn map_to_mut<R: ?Sized, F>(self, f: F) -> Map<Self, F, HKTRefMut<R>> where for<'any> F: FnMut([&'any Self; 0], Item<'any, Self>) -> &'any mut R, Self: Sized,

Convenience method: same as .map(), but for hard-coding the HKT parameter to HKTRefMut<R> = HKT!(&mut R).

fn map_into_iter<F, NonLendingItem>(self, f: F) -> MapIntoIter<Self, F> where F: FnMut(Item<'_, Self>) -> NonLendingItem, Self: Sized,

Convenience shorthand for .map…(…).into_iter().

fn filter_map<NewItemType: HKT, F>( self, f: F ) -> FilterMap<Self, F, NewItemType> where for<'next> F: FnMut([&'next Self; 0], Item<'next, Self>) -> Option<Feed<'next, NewItemType>>, Self: Sized,

LendingIterator counterpart of Iterator::filter_map().

fn filter_map_to_ref<R: ?Sized, F>(self, f: F) -> FilterMap<Self, F, HKTRef<R>> where for<'any> F: FnMut([&'any Self; 0], Item<'any, Self>) -> Option<&'any R>, Self: Sized,

Convenience method: same as .filter_map(), but for hard-coding the HKT parameter to HKTRef<R> = HKT!(&R).

fn filter_map_to_mut<R: ?Sized, F>( self, f: F ) -> FilterMap<Self, F, HKTRefMut<R>> where for<'any> F: FnMut([&'any Self; 0], Item<'any, Self>) -> Option<&'any mut R>, Self: Sized,

Convenience method: same as .filter_map(), but for hard-coding the HKT parameter to HKTRefMut<R> = HKT!(&mut R).

fn filter_map_into_iter<F, NonLendingItem>( self, f: F ) -> FilterMapIntoIter<Self, F> where F: FnMut(Item<'_, Self>) -> Option<NonLendingItem>, Self: Sized,

Convenience shorthand for .filter_map…(…).into_iter().

fn into_iter<Item>(self) -> IntoIter<Self> where Self: for<'any> LendingIteratorඞItem<'any, T = Item> + Sized,

Convert a Self : LendingIterator into an Iterator, provided Self::Item<'_> does not depend on '_.

fn dyn_boxed<'usability>( self ) -> Box<dyn LendingIteratorDyn<Item = HKTItem<Self>> + 'usability>where Self: 'usability + Sized,

Available on crate feature alloc only.

Converts this LendingIterator into a Box<dyn LendingIteratorDyn…>.

fn dyn_boxed_auto<BoxedDynLendingIterator, Item: HKT>( self ) -> BoxedDynLendingIteratorwhere Self: Sized + DynCoerce<BoxedDynLendingIterator, Item>,

Available on crate feature alloc only.

Converts this LendingIterator into a Box<dyn LendingIteratorDyn…>.